Engine-stop device.



G. W. EDWARDS.

ENGINE STOP DEVlCE.

APPLICATION m) SEPT. 8. 1915.

Patented Aug. 29, 1916.

avwanto'c Geo RGE W EDWA DS elit sm n4 GEORGE EDWARDS, OF FORT EDWARD,NEW YORK.

ENGINE-STOP DEVICE.

Application filed September 8, 1915.

To all whom it may concern Be it known that I, GEORGE W. EDWARDS, acitizen of the United States, residing at Fort Edward, in the county ofWashington and State of New York, have invented certain new and usefulImprovements in Engine-Stop Devices, of which the following is aspecification, reference being had to the accompanying drawings.

This invention relates to an improved engine stop device and has for itsprimary object to provide a simple and positively op erating means forautomatically cutting ofl the supply of motive fluid to the engine whenthe belt shifts to an excessive extent upon the fly wheel and there isimminent danger of the belt moving entirely off the wheel. I

The invention has for a more particular object to provide a gravitycontrolled cable connected to the cut-ofi' valve in the supply pipe, andmeans for holding the gravity means against operation, including a cableor other flexible member extending upon each side of the fly wheel,contiguous to the edges of the belt and adapted to be engaged thereby torelease the gravity means, whereby the same will act to out off thesupply of motive fluid.

The invention has for a further general object to provide a device forthe above purpose which consists of very few parts of simpleconstruction and arrangement so that the device is not liable to get outof order but is reliable and eflicient in practical use.

With the above and other objects in view, my invention consists in thenovel features of construction, combination and arrangement of parts tobe hereinafter more fully described, claimed and illustrated in theaccompanying drawing, in which,

Figure 1 is an elevation showing conventionally, an engine and its flywheel with my improved automatic stop device applied thereto; and Fig. 21s atop plan view.

Referring in detail to the drawing, E indicates an engine of anyordinary or approved construction, P the supply pipe for the engine, andV the controlling valve in said pipe.

Specification of Letters Patent.

Patented Aug. 29, 1916.

Serial N 0. 49,472.

W designates the fiy wheel traversed by the belt B.

In the drawing, I have illustrated a cen-l trifugally controlledactuating member 5 for the stop mechanism, which is mounted upon the flywheel W. This device is fully lllustrated and described in my Patent No.

1,137,054:, issued April 27, 1915. The specific construction thereofwill not, therefore, be set forth in the present application. In asuitable support 6, a vertically disposed lever 7 is fulcrumedintermediate of its ends, as indicated at 8. The lower end of this lever7 is curved, as shown, and upon the same is hung a weight 9. An arm 10is also fulcrumed intermediate of its ends in the support 6, as shown at11, and one end of this arm is provided with an open ing to receive theupper end of the lever 7 and hold the same against pivotal movementunder the gravity action of the weight 9. The other end of this arm 10is adapted for engagement by the centrifugally controlled actuatingmember 5 in the same manner as set forth in my prior patent hereinbeforereferred to.

Adjacent to the engine proper, a second vertically disposed pivotedlever 12 and other end thereof is connected tothe pivoted arm 18. A wireor cable 18 is also connected to the weight 14 and extends upwardly overa guide pulley 19 and is attached to the arm a of an emergency valve A.

An operating cable 20 is trained around suitable guide pulleys 21 andhas one of its ends extended upwardly and connected to the pivoted arm10. This operating cable is. so arranged as to provide parallelstretches disposed upon relatively opposite sides of the fly wheel W andcontiguous to the edges of the belt B, the other end of the cable beingsuitably fixed to a stationary element, indicated at 22.

previously described. 85

In the operation of the device as above 'set forth, it will beunderstood that, in the event of a lateral shifting movement of the beltB upon the periphery of the fly wheel, to an excessive extent, the edgeof the belt will engage one stretch of the operating cable 20, therebycausing said cable to exert a downward pull upon the end of the arm 10and move. the opposite end thereof upwardly to release the lever 7. Theweight 9 will, therefore, act by gravity to-pull upon the cable 17 andthe second arm 13 will be actuated to release the lever 12 so that theweight 14 can act in a similar manner to pull upon the cable 18 andoperate the emergency valve A, whereby the supply of motive fluid to theengine cylinders will be cut off;

From the foregoing, it will be seen that I have produced a simple andyet positively operating means which will act automatically upon theexcessive shifting of the fly wheel belt to stop the operation of theengine. In view of the very simple arrangement of the severalcooperating elements, it

is manifest that the invention may be applied to engines of the varioustypes now in general use without necessitating any material alterationsin their construction. The device may also be produced at smallmanufacturing cost and provides a safe, re-

liable and convenient means for stopping an engine and obviating allpossibility of injury thereto from accidental causes such as that abovereferred to.

While I have shown and described the preferred construction andarrangement of the several parts of the device, it is to be understoodthat the same is susceptible of considerable modification therein and I,therefore, reserve the privilege of resorting to all such legitimatechanges as may be fairly embodied Within the spirit and scope of theinvention as claimed;

Having thus fully described my invention, what I desire to claim andsecure by Letters Patent is ply of motive fluid thereto, and a fly wheelbelt, of gravity actuated means for operating the said'valve to closethe same, a latch element normally preventing the operation of saidgravity means, and a movable cable connected to the latch element andextending adjacent to one edge of the fly wheel belt to be engagedthereby upon an excessive movement of the belt whereby the latch isoperated to release the gravity means for actuation and close theemergency valve.

3. The combination with an engine having a supply pipe and an emergencycontrol valve therein, and a fly wheel belt, of a vertically disposed,pivotally mounted lever, a gravity movable weight on one end of saidlever, a cable connection between said weight and the emergency valve tooperate the latter, a pivoted latch arm engaging said lever to normallyhold the weight against gravity movement, and an operating cableconnected to the latch and disposed contiguous to one edge of the flywheel belt to be engaged thereby upon an excessive movement of the belt,whereby the latch is operated and the lever released to permit of thegravity movement of the weight whereby the emergency valve is closed.

4. The combination with an engine having a supply pipe and an emergencycontrol valve therein, and a fly wheel belt, of a pivotall mountedlever, a weight attached to said lbver, a pivoted latch arm engaging thelever to hold the same against movement under the gravity action of theweight, operating means connecting the weight to the emergency controlvalve, and an operating cable fixed at one of its ends and havingparallel stretches disposed upon opposite sides of the fly wheelcontiguous to the edges of the fly wheel belt, the other end of thecable being connected to said latch arm, said cable being engaged by thebelt upon an excessive shifting movement thereof to move the latch armand release the lever, whereby the control valve is closed in thegravity movement of said weight.

5. The combination with an engine including a fly wheel belt, saidengine having a supply pipe and an emergency control valve therein, ofmeans normally holding said valve open during the operation of theengine and actuated by said fly wheel belt upon a slipping movement ofthe belt relative to the fly wheel, whereby the valve is closed.

6. The combination with an engine including a fly wheel belt, saidengine having a supply pipe and an emergency control valve therein, ofmechanism operatively connected to said valve to normally hold the samein open position during the operation of the engine, and means actuatedby said fly wheel belt upon excessive lateral slippage thereof to permitsaid valve operating means to operate and close the valve.

7. The combination with an engine, controlling means therefor and a flywheel belt,

In testimony whereof I hereunto aifix my signature in the presence oftwo witnesses.

GEO. W. EDWARDS.

Witnesses JAMES A. MORRISON, DAVID SHEPARD.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patentn,

Washington, D. G.

